gall

Larvae of the spring generation make a gall in the catkins, where they also pupate. The gall of the summer generation is a swollen bud that only partly opens into a hairy rosette, where several orange-red larvae are living.

host plants

References to other species (Houard, 1908a; Béguinot, 2012a) are almost certainly is incorrect.

larva

prosternum with spatula (from Möhn, 1955a)

synonyms

Cecidomyia, Dasineura, Rhabdophaha, heterobia.

notes

According to the literature there are two genertions: a hibernating generation that in spring causes catkin-galls, and a summer generation galling terminal buds. This seems incorrect: the pictures of the summer gall from Hungary were made in spring, even a few days before those of the spring generation (May 1st and 5th, respectively) This rather suggests that both gall types are caused simultaneously by the same generation. It is not clear if this generation is followed by a second one that obviously can only cause bud galls.